gonzui

tkernel_2

monitor/driver/sio/src/ns16550.c - 11.6KB - 294 lines

193:         /* wait until transmission is ready. */
194:         while ((IN(regLSTS) & LS_THRE) == 0);
195: 
199:         /* wait until the completion of transmission */
200:         while ((IN(regLSTS) & LS_THRE) == 0);
201: }
223:                 /* is there data in FIFO? */
224:                 if ( !((sts = IN(regLSTS)) & (LS_DRDY | LS_RxERR))) {
225:                         if (scb->iptr != scb->optr) break;  /* already received */
231:                 /* receive data input */
232:                 if (sts & LS_DRDY) c = IN(regDATA);
233: 
274:         /* initialize serial controller */
275:         IN(regLSTS);                   /* clear IS_LSTS */
276:         IN(regINTS);                   /* clear IS_SND  */
277:         IN(regMSTS);                   /* clear IS_MSTS */
278: